@Andreaamne I moved your post over to this existing thread: Tracks duplicate in personal playlist
Unfortunately, there isn't currently a way to bulk delete tracks on playlists.
If you'd like to see that feature added to the service, I recommend upvoting this existing thread: Ideas: Bulk Add-Delete-Edit-Search Content (Stations, Playlists, Thumbs)
For now, you will need to manually remove each duplicate track one at a time.
Check out the accepted solution to this thread for instructions on how you can remove those tracks from your playlist: How to edit playlist
I'm happy to pass your feedback along to our engineering team in the meantime - what is the name of the playlist that has duplicates being added?
Let me know.
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